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Industry Segment and Geographic Area Data (Table Text Block) | 6 Months Ended
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Sep. 30, 2013
Geographic Areas, Long-Lived Assets [Abstract] |
Industry Segment and Geographic Area Data | 11. Industry Segment and Geographic Area Data
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Quarter ended September 30, 2013 |  |  |  |  |  |
Total revenues | $ | 786,721 | $ | 49,770 | $ | 836,491
Depreciation and amortization, net of (gains) losses on disposals |  | 67,355 |  | 1,910 |  | 69,265
Interest expense |  | 22,977 |  | 141 |  | 23,118
Pretax earnings |  | 207,480 |  | 9,368 |  | 216,848
Income tax expense |  | 76,374 |  | 2,483 |  | 78,857
Identifiable assets |  | 5,626,460 |  | 149,885 |  | 5,776,345
Quarter ended September 30, 2012 |  |  |  |  |  |
Total revenues | $ | 695,622 | $ | 48,495 | $ | 744,117
Depreciation and amortization, net of (gains) losses on disposals |  | 59,972 |  | 2,070 |  | 62,042
Interest expense |  | 21,961 |  | 152 |  | 22,113
Pretax earnings |  | 162,693 |  | 9,516 |  | 172,209
Income tax expense |  | 60,267 |  | 2,522 |  | 62,789
Identifiable assets |  | 4,984,218 |  | 152,746 |  | 5,136,964
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Six months ended September 30, 2013 |  |  |  |  |  |
Total revenues | $ | 1,490,684 | $ | 92,638 | $ | 1,583,322
Depreciation and amortization, net of (gains) losses on disposals |  | 126,525 |  | 3,857 |  | 130,382
Interest expense |  | 46,163 |  | 283 |  | 46,446
Pretax earnings |  | 379,236 |  | 16,660 |  | 395,896
Income tax expense |  | 140,522 |  | 4,415 |  | 144,937
Identifiable assets |  | 5,626,460 |  | 149,885 |  | 5,776,345
Six months ended September 30, 2012 |  |  |  |  |  |
Total revenues | $ | 1,321,805 | $ | 89,988 | $ | 1,411,793
Depreciation and amortization, net of (gains) losses on disposals |  | 116,935 |  | 4,043 |  | 120,978
Interest expense |  | 45,300 |  | 304 |  | 45,604
Pretax earnings |  | 282,077 |  | 17,520 |  | 299,597
Income tax expense |  | 104,965 |  | 4,643 |  | 109,608
Identifiable assets |  | 4,984,218 |  | 152,746 |  | 5,136,964

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- Definition Tabular disclosure of the names of foreign countries in which material long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets are located, and amount of such long-lived assets located in that country or foreign geographic area. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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